Tool cart with tool missing alarm function

Abstract

The utility model relates to tool car technical field discloses a tool car with tool missing alarm function, including tool car and universal wheel, the position of tool car inner wall near top is fixedly connected with guide rail, the surface of guide rail is connected with storage cabinet of sliding, the bottom of storage cabinet is fixedly connected with bearing rail, the bottom of storage cabinet inner wall is fixedly connected with bottom plate, the top of bottom plate is fixedly installed with weight sensor, the inner wall of storage cabinet is fixedly connected with baffle, the surface of baffle is fixedly connected with sliding rail, the surface of sliding rail is connected with sub -storage box of sliding. The tool car with tool missing alarm function, through weight sensor real -time acquisition sub -storage box and the weight data of inside tool, and compare with preset reference threshold value, when the weight is below threshold value when tool is not returned or lost, the alarm gives prompt immediately, help staff to find tool missing problem in time, avoid because tool omissions cause property loss, prevent simultaneously because tool deficiency leads to operation interruption, guarantee daily maintenance.

Description

Technical Field

[0001] This utility model belongs to the field of tool cart technology, specifically, it relates to a tool cart with a tool missing alarm function. Background Technology

[0002] In industrial production, equipment maintenance, and construction, tool carts serve as core equipment for tool storage and transportation, and their ease of use and functionality directly impact work efficiency. However, existing traditional tool carts generally suffer from inadequate tool management: most tool carts only use simple drawers and partitions for tool storage, lacking a targeted missing tool monitoring mechanism. After frequent tool retrieval and placement, workers are prone to forgetting to return tools or accidentally losing them, which not only causes tool asset damage but also requires additional time to search for missing tools. Furthermore, shortages of critical tools can even disrupt workflows and delay project progress. Utility Model Content

[0003] The purpose of this invention is to provide a tool cart with a tool shortage alarm function to solve the problems mentioned in the background art.

[0004] A tool cart with a tool shortage alarm function includes a tool cart and casters fixedly installed on the bottom of the tool cart. A hook is fixedly connected to the top side of the tool cart. A guide rail is fixedly connected to the inner wall of the tool cart near the top. A storage cabinet is slidably connected to the surface of the guide rail. A load-bearing rail is fixedly connected to the bottom of the storage cabinet. A base plate is fixedly connected to the bottom of the inner wall of the storage cabinet. A weight sensor is fixedly installed on the top of the base plate. A partition is fixedly connected to the inner wall of the storage cabinet. A slide rail is fixedly connected to the surface of the partition. A storage compartment is slidably connected to the surface of the slide rail.

[0005] In a preferred embodiment of this utility model, a pull rod is fixedly connected to the front of the storage cabinet, a positioning block is fixedly connected to the bottom of the storage box, positioning grooves adapted to the positioning blocks are opened on the top left and right sides of the weight sensor, the two ends of the load-bearing rail are fixedly connected to the inner wall of the tool cart, and the weight sensor is equipped with an alarm.

[0006] In a preferred embodiment of this utility model, a miniature hydraulic cylinder is fixedly installed on the bottom of the inner wall of the tool cart. A load-bearing frame is fixedly connected to the top of the miniature hydraulic cylinder. A storage plate is fixedly connected to the top of the load-bearing frame. A sliding groove is formed on the upper surface of the storage plate. A slider is slidably connected inside the sliding groove. A connecting frame is fixedly connected to the bottom of the slider. A telescopic rod is connected to the surface of the slider. A limit rod is fixedly connected to the top of the outer surface of the telescopic rod. A buffer plate is fixedly connected to the bottom of the limit rod.

[0007] In a preferred embodiment of this utility model, there are two sliders, and a sliding rod is fixedly connected to the side of the two sliders that are far apart from each other. The sliding rod passes through the surface of the telescopic rod and is rotatably connected to the telescopic rod.

[0008] In a preferred embodiment of this utility model, a power supply box is fixedly installed on the bottom of the inner wall of the tool cart, and the power supply box is electrically connected to the miniature hydraulic cylinder, the weight sensor and the alarm respectively.

[0009] In a preferred embodiment of this utility model, the front of the tool cart is hinged to a door, a placement frame is fixedly connected to the inner wall of the door, a ventilation hole is provided on the surface of the placement frame, a through drainage groove is provided on the lower surface of the placement frame, an inclined plate is fixedly connected to the bottom of the inner wall of the door, a drainage hole is provided at the bottom of the door, and a drain pipe communicating with the drainage hole is fixedly connected to the bottom of the door.

[0010] In a preferred embodiment of this utility model, a back plate is fixedly connected to the back of the tool cart, a ventilation box is fixedly connected to the front of the back plate, a fan is fixedly installed inside the back plate, and a filter element one and a filter element two are provided inside the ventilation box.

[0011] Compared with the prior art, the present invention has the following advantages: 1. This tool cart with a tool loss alarm function collects the weight data of the storage box and the tools inside in real time through a weight sensor and compares it with a preset benchmark threshold. When the weight is lower than the threshold due to the failure to return or loss of tools, the alarm will immediately sound to help staff discover tool loss problems in time, avoid property loss due to tool omission, and prevent work interruption due to insufficient tools, thus ensuring daily maintenance.

[0012] 2. This tool cart with a tool missing alarm function has a layered and classified storage structure formed by storage boxes and shelves. The storage boxes can be flexibly pushed and pulled by sliding rails, which facilitates the classification and storage of small tools. The shelves are equipped with sliding sliders and retractable limit rods, which can be adjusted to fix the position and height according to the size of the tools, so that tools of different sizes can be placed stably, making the tools stored more neatly. When workers need to retrieve tools, they can quickly locate the required tools without having to search for them.

[0013] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings. Attached Figure Description

[0014] In the attached diagram: Figure 1 This is a schematic diagram of the overall structure of the tool cart of this utility model; Figure 2 This is a schematic diagram of the rear structure of the tool cart of this utility model; Figure 3 This is a schematic diagram of the door structure of this utility model; Figure 4 This is a schematic diagram of the internal structure of the storage cabinet of this utility model; Figure 5 This is a schematic diagram of the bottom structure of the storage cabinet of this utility model; Figure 6 This is a schematic diagram of the storage cabinet installation structure of this utility model; Figure 7 This is a schematic diagram of the shelf structure of this utility model; Figure 8 This is a schematic diagram of the ventilation box structure of this utility model.

[0015] In the diagram: 1. Tool cart; 2. Casters; 3. Door; 301. Placement frame; 302. Ventilation hole; 303. Drainage channel; 304. Inclined plate; 305. Drain pipe; 4. Storage cabinet; 401. Guide rail; 402. Partition; 403. Slide rail; 404. Storage box; 405. Positioning block; 406. Base plate; 407. Weight sensor; 408. Load-bearing rail; 5. Back panel; 501. Ventilation box; 502. Fan; 503. Filter element one; 504. Filter element two; 6. Hook; 7. Shelf; 701. Slide groove; 702. Slider; 703. Telescopic rod; 704. Limiting rod; 705. Connecting frame; 706. Buffer plate; 707. Miniature hydraulic cylinder; 708. Load-bearing frame; 8. Power supply box. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate this utility model.

[0017] Example 1: like Figures 1 to 8As shown, a tool cart with a tool shortage alarm function includes a tool cart 1 and casters 2 fixedly installed at the bottom of the tool cart 1. A hook 6 is fixedly connected to the top side of the tool cart 1. A guide rail 401 is fixedly connected to the inner wall of the tool cart 1 near the top. A storage cabinet 4 is slidably connected to the surface of the guide rail 401. A load-bearing rail 408 is fixedly connected to the bottom of the storage cabinet 4. A base plate 406 is fixedly connected to the bottom of the inner wall of the storage cabinet 4. A weight sensor 407 is fixedly installed on the top of the base plate 406. A partition 402 is fixedly connected to the inner wall of the storage cabinet 4. A slide rail 403 is fixedly connected to the surface of the partition 402. A sub-storage box 404 is slidably connected to the surface of the slide rail 403. A pull rod is fixedly connected to the front of the storage cabinet 4. A positioning block 405 is fixedly connected to the bottom of the sub-storage box 404. Positioning grooves adapted to the positioning block 405 are opened on the left and right sides of the top of the weight sensor 407. The two ends of the load-bearing rail 408 are fixedly connected to the inner wall of the tool cart 1. The weight sensor 407 is equipped with an alarm.

[0018] A miniature hydraulic cylinder 707 is fixedly installed on the bottom of the inner wall of the tool cart 1. A load-bearing frame 708 is fixedly connected to the top of the miniature hydraulic cylinder 707. A storage plate 7 is fixedly connected to the top of the load-bearing frame 708. A sliding groove 701 is opened on the upper surface of the storage plate 7. A slider 702 is slidably connected inside the sliding groove 701. A connecting frame 705 is fixedly connected to the bottom of the slider 702. A telescopic rod 703 is connected to the surface of the slider 702. A limit rod 704 is fixedly connected to the top of the outer surface of the telescopic rod 703. A buffer plate 706 is fixedly connected to the bottom of the limit rod 704. There are two sliders 702. A sliding rod is fixedly connected to the side of the two sliders 702 that is far apart from each other. The sliding rod passes through the surface of the telescopic rod 703 and is rotatably connected to the telescopic rod 703.

[0019] A power supply box 8 is fixedly installed on the bottom of the inner wall of the tool cart 1. The power supply box 8 is electrically connected to the miniature hydraulic cylinder 707, the weight sensor 407 and the alarm respectively.

[0020] Example 2: Based on Embodiment 1, the front of the tool cart 1 is hinged to a door 3, the inner wall of the door 3 is fixedly connected to a placement frame 301, the surface of the placement frame 301 is provided with a ventilation hole 302, the lower surface of the placement frame 301 is provided with a through drainage groove 303, the bottom of the inner wall of the door 3 is fixedly connected to a sloping plate 304, the bottom of the door 3 is provided with a drainage hole, and the bottom of the door 3 is fixedly connected to a drain pipe 305 communicating with the drainage hole.

[0021] The tool cart 1 has a back plate 5 fixedly connected to the back, and a ventilation box 501 fixedly connected to the front of the back plate 5. A fan 502 is fixedly installed inside the back plate 5, and a filter element 1 503 and a filter element 2 504 are installed inside the ventilation box 501.

[0022] The alarm is fixed in a conspicuous place on the top outside of the tool cart 1 or the inside of the door 3. It adopts an integrated sound and light design. The sound decibel range meets the warning standards for industrial operating environments. The light is a high-brightness LED strobe mode to ensure that the staff can quickly detect the alarm signal in noisy environments.

[0023] The weight sensor 407 uses a high-precision piezoelectric sensor with a measurement accuracy of ±0.1g. Its range is compatible with the total weight of the storage box 404 and conventional tools. Its protection level is IP65, which can withstand slight vibrations and dust intrusion during the use of the tool cart, thus avoiding affecting the detection accuracy.

[0024] Threshold calibration operation: The power supply box 8 has a calibration button and display screen on the front. After pressing the calibration button, the display screen shows calibration in progress. At this time, put in a complete set of standard tools. The sensor will automatically collect and update the reference weight threshold. After the calibration is completed, the display screen will show calibration success. No additional complicated operations are required.

[0025] The power supply box 8 is equipped with a lifting adjustment knob and an emergency stop button. Rotating the knob clockwise raises the shelf 7, and rotating it counterclockwise lowers it. The knob can be locked in any position, and the corresponding shelf height is displayed in real time on the screen. In case of emergency, pressing the emergency stop button will immediately stop the hydraulic cylinder, ensuring operational safety.

[0026] The power supply box 8 has a built-in 24V lithium battery, which can support the alarm to work continuously for 72 hours, the micro hydraulic cylinder to lift 50 times, and the fan 502 to run continuously for 8 hours when fully charged. It is equipped with a Type-C charging interface, and the charging time is 3-4 hours. During charging, the display screen shows the remaining power percentage, which makes it easy for staff to keep track of the charging progress.

[0027] The surfaces of guide rail 401 and slide rail 403 are coated with wear-resistant grease to reduce sliding friction resistance and prevent rust. The guide rail 401 is equipped with limit blocks at both ends to prevent the storage cabinet 4 from coming off when pushed or pulled. The storage box 404 is equipped with anti-loosening buckles on both sides, which automatically lock when closed to prevent the storage box from accidentally sliding off when the tool cart is moved.

[0028] The surface of the buffer plate 706 is provided with anti-slip texture to further enhance the friction with the tool surface; the limiting rod 704 can rotate 0-90° around the slide bar. When the tool height is low, the limiting rod can be rotated to a horizontal state to avoid taking up extra space and improve the flexibility of the shelf.

[0029] The drain pipe 305 is made of flexible rubber and has a removable sealing cap at the pipe opening. When not draining, the sealing cap is closed to prevent dust from entering. The inclined plate 304 has an anti-corrosion treatment and is sealed to the inner wall of the door 3 to prevent water from leaking into other areas inside the tool vehicle.

[0030] Assembly of the tool cart: A guide rail 401 is fixed on the inner wall of the tool cart 1 near the top. The storage cabinet 4 is slidably connected to the guide rail 401 via the load-bearing rail 408 at the bottom, so that the storage cabinet 4 can be pushed and pulled smoothly along the guide rail 401. A partition 402 is fixed on the inner wall of the storage cabinet 4, and a slide rail 403 is installed on the surface of the partition 402. The sub-storage box 404 is slidably connected to the slide rail 403, and at the same time, the positioning block 405 at the bottom of the sub-storage box 404 is embedded in the positioning groove of the weight sensor 407 at the top of the base plate 406.

[0031] A miniature hydraulic cylinder 707 is fixed to the bottom of the inner wall of the tool cart 1. A load-bearing frame 708 is connected to the top of the miniature hydraulic cylinder 707, and a storage plate 7 is fixed above the load-bearing frame 708. Two sliders 702 are installed in the slide groove 701 of the storage plate 7. The telescopic rod 703 is rotatably connected to the sliders 702 through the slide rod. A limit rod 704 is installed on the top of the telescopic rod 703, and a buffer plate 706 is fixed at the bottom of the limit rod 704.

[0032] The door 3 is hinged to the front of the tool cart 1. A frame 301 is fixed to the inner wall of the door 3, and a sloping plate 304 and a drain pipe 305 are installed at the bottom of the door 3 to ensure that the drain pipe 305 is connected to the drain hole. A back plate 5 is fixed to the back of the tool cart 1, and a ventilation box 501 and a fan 502 are installed on the back plate 5. Filter element 1 503 and filter element 2 504 are placed inside the ventilation box 501 in sequence. The power supply box 8 is fixed to the bottom of the inner wall of the tool cart 1 and is electrically connected to the miniature hydraulic cylinder 707, the weight sensor 407 and the alarm respectively.

[0033] Tools are categorized and stored according to size and type. Small tools are placed in the storage box 404 and can be retrieved or placed by pushing and pulling the storage box 404 using the slide rail 403. Larger tools are placed on the shelf 7, and the position of the limit rod 704 is adjusted by sliding the slider 702. The telescopic rod 703 is extended to make the buffer plate 706 fit against the tool surface, thereby clamping and fixing the tool.

[0034] The extension and retraction of the miniature hydraulic cylinder 707, controlled by the power supply box 8, drives the load-bearing frame 708 and the storage plate 7 to move up and down, adjusting the storage plate 7 to a height convenient for picking up and placing tools. Wet tools can be placed in the placement frame 301 of the door 3, and moisture flows through the drain channel 303 to the inclined plate 304, and then is discharged through the drain hole and drain pipe 305. Turning on the fan 502 can ventilate and dry the interior of the tool cart 1. The air enters the cart after being filtered by filter element one 503 and filter element two 504, reducing the chance of tools getting damp and rusting.

[0035] Working principle: Before the tool cart is officially put into use, the weight baseline value needs to be set. The operator places the corresponding storage box 404 and the complete set of standard tools inside onto the weight sensor 407. Through the precise engagement of the positioning block 405 and the positioning groove, it is ensured that the bottom of the storage box 404 is completely in contact with the detection surface of the weight sensor 407, avoiding weight detection errors caused by contact deviation. At this point, the weight sensor 407 uses the detected total weight of the storage box and the complete set of tools as the baseline weight threshold and stores this data in its internal chip, forming a reference standard for subsequent weight comparisons.

[0036] During the use of the tool cart, the weight sensor 407 remains powered on and continuously collects real-time weight data from the storage bin 404. Because the storage bin 404 is slidably connected to the storage cabinet 4 via the slide rail 403, and the positioning block 405 is always embedded in the positioning slot, the relative position of the storage bin 404 and the weight sensor 407 remains stable even when workers push or pull the storage bin to retrieve tools, ensuring the continuity and accuracy of weight detection. The weight sensor 407 converts the real-time collected weight signal into an electrical signal, which is transmitted to the alarm's control module via a wire.

[0037] After receiving the real-time weight signal transmitted by the weight sensor 407, the alarm control module compares it with the preset benchmark weight threshold in real time. When all the tools are in the storage box 404, the real-time weight is equal to or close to the benchmark weight threshold. The control module determines that no tools are missing and the alarm remains silent.

[0038] If staff fail to return the tools from storage box 404 promptly after taking them, or if tools are accidentally lost, the real-time weight will fall below the baseline weight threshold and exceed the allowable deviation range. In this case, the control module determines that a tool is missing and immediately sends a trigger signal to the alarm, reminding staff to check the tool quantity and replenish any missing tools promptly to prevent omissions or losses.

[0039] Upon detecting the alarm, staff return the missing tool to its storage compartment 404, restoring the real-time weight to within the baseline weight threshold range. After the weight sensor 407 detects the weight increase, it transmits a weight compliance signal to the control module, which automatically triggers an alarm reset, stopping the alarm. If the tool shows significant wear after prolonged use, the weight calibration process can be restarted via the calibration button on the power supply box 8 to update the baseline weight threshold, ensuring the accuracy of the alarm function and preventing false alarms caused by natural tool wear.

[0040] The battery inside the power supply box 8 provides DC power to the miniature hydraulic cylinder 707. When the operator presses the height adjustment button, the power supply box 8 sends a control signal to the solenoid directional valve of the miniature hydraulic cylinder 707, which drives the hydraulic cylinder to extend and retract: after receiving the signal, the solenoid directional valve changes the flow direction of the hydraulic oil.

[0041] When it is necessary to raise the shelf 7, the electromagnetic reversing valve controls the hydraulic oil to enter the rodless chamber of the micro hydraulic cylinder 707, pushing the piston rod to extend upward. The piston rod drives the top support frame 708 to rise synchronously, thereby causing the shelf 7 fixed on the support frame 708 to move upward until the target height is reached.

[0042] When it is necessary to lower the shelf 7, the solenoid directional valve controls the hydraulic oil to enter the rod chamber of the micro hydraulic cylinder 707, pushing the piston rod to retract downwards. The load-bearing frame 708 and the shelf 7 descend synchronously with the piston rod, completing the height adjustment.

[0043] The miniature hydraulic cylinder 707 adopts a one-way hydraulic lock design. When the operator releases the height adjustment button, the electromagnetic reversing valve resets, the hydraulic oil stops flowing, and the one-way hydraulic lock automatically locks the hydraulic oil in the hydraulic cylinder to prevent the piston rod from extending or retracting on its own under the weight of the shelf 7 and the tool. This ensures that the shelf 7 remains stably at the set height and avoids affecting the picking and placing of tools due to height deviation.

[0044] The slider 702 and the groove 701 of the shelf 7 are designed with clearance fit, allowing the slider 702 to slide freely along the length of the groove 701. The operator can adjust the lateral spacing of the limiting rods 704 by pushing the two sliders 702 closer or further apart according to the tool's lateral dimensions, so that the limiting rods 704 can clamp and fix the tool from both sides.

[0045] The telescopic rod 703 consists of an outer rod and an inner rod. The inner wall of the outer rod and the outer wall of the inner rod are precisely slidably fitted, and the outer rod is equipped with an elastic locating pin. When it is necessary to adjust the longitudinal height of the limiting rod 704, pressing the locating pin will release the lock between the outer rod and the inner rod, allowing the inner rod to extend or retract until the buffer plate 706 at the bottom of the limiting rod 704 contacts the top surface of the tool. After releasing the locating pin, the locating pin will embed into the locating hole of the inner rod, thus locking the length of the telescopic rod 703.

[0046] The buffer plate 706 is made of rubber, which has good elasticity and wear resistance. When the buffer plate 706 comes into contact with the tool surface, the elastic deformation of the rubber material can absorb the impact force during the clamping process, avoiding scratches and deformation of the tool surface caused by rigid contact; at the same time, the buffer plate 706 has a large friction with the tool surface, which can enhance the fixation stability and prevent the tool from sliding or tipping over due to bumps during the movement of the tool cart.

[0047] Fan 502 is electrically connected to power supply box 8. After the operator turns on the ventilation switch, power supply box 8 supplies power to fan 502. The motor of fan 502 drives the fan blades to rotate at high speed, creating a negative pressure inside ventilation box 501.

[0048] Air filtration: Outside air enters the ventilation box 501 under negative pressure. It first passes through filter element 1 503, which is a non-woven fabric filter to remove large particles of dust, hair and other impurities from the air. Then it passes through filter element 2 504, which is a HEPA filter to further remove fine particles, water vapor and odors, ensuring that the air entering the tool cart is clean and dry.

[0049] The filtered, dry, and clean air enters the tool cart 1 through the air outlet of the ventilation box 501, mixing with the humid air inside the cart to form an air circulation. At the same time, the humid air inside the tool cart 1 can be exhausted outside the cart through gaps between the door 3 and the vehicle body, and gaps in the storage cabinet 4, accelerating the air renewal inside the cart and reducing relative humidity, thereby protecting the tools from moisture and rust.

[0050] Workers place wet tools into the placement frame 301 on the inner wall of the door 3. The placement frame 301 has a grid-like or hollow design, and water on the surface of the tools can drip off through the gaps in the placement frame 301. At the same time, the ventilation holes 302 on the surface of the placement frame 301 can promote air circulation and accelerate the evaporation of moisture on the surface of the tools. The evaporated water vapor can be discharged outside the vehicle through the ventilation system.

[0051] A drainage groove 303 on the lower surface of the placement frame 301 is connected to the interior of the placement frame 301. The dripping water flows directly into the inclined plate 304 at the bottom of the inner wall of the door 3 through the drainage groove 303. The inclined plate 304 is designed with an inclination angle of 15°-30°, and the inclination direction is towards the drainage hole at the bottom of the door 3. Under the action of gravity, the water flows along the inclined surface of the inclined plate 304 to the drainage hole.

[0052] The drain hole at the bottom of the door 3 is sealed to the drain pipe 305. The water flowing into the drain hole is discharged directly to the outside of the tool vehicle through the drain pipe 305, preventing water from accumulating inside the vehicle and preventing the tools from getting damp or the inside of the vehicle from rusting.

[0053] The power supply box 8 is equipped with a 12V / 24V lead-acid battery or lithium battery, which is connected to electrical components such as the miniature hydraulic cylinder 707, weight sensor 407, alarm, and fan 502 via wires, providing stable DC power to each component. Simultaneously, the power supply box 8 has independent circuit switches, which can control the power supply status of different components individually, allowing operators to flexibly operate according to actual needs.

Claims

1. A tool cart with a tool missing alarm function, comprising a tool cart (1) and a universal wheel (2) fixedly installed at the bottom of the tool cart (1), and a hook (6) fixedly connected to the top of the side of the tool cart (1), characterized in that: The tool cart (1) has a guide rail (401) fixedly connected to the inner wall near the top. A storage cabinet (4) is slidably connected to the surface of the guide rail (401). A load-bearing rail (408) is fixedly connected to the bottom of the storage cabinet (4). A base plate (406) is fixedly connected to the bottom of the inner wall of the storage cabinet (4). A weight sensor (407) is fixedly installed on the top of the base plate (406). A partition (402) is fixedly connected to the inner wall of the storage cabinet (4). A slide rail (403) is fixedly connected to the surface of the partition (402). A storage box (404) is slidably connected to the surface of the slide rail (403).

2. The tool cart with a tool missing alarm function according to claim 1, characterized in that: A pull rod is fixedly connected to the front of the storage cabinet (4), a positioning block (405) is fixedly connected to the bottom of the storage box (404), a positioning groove adapted to the positioning block (405) is opened on the top left and right sides of the weight sensor (407), the two ends of the load-bearing rail (408) are fixedly connected to the inner wall of the tool cart (1), and the weight sensor (407) is equipped with an alarm.

3. The tool cart with a tool missing alarm function according to claim 1, characterized in that: A miniature hydraulic cylinder (707) is fixedly installed on the bottom of the inner wall of the tool cart (1). A load-bearing frame (708) is fixedly connected to the top of the miniature hydraulic cylinder (707). A storage plate (7) is fixedly connected to the top of the load-bearing frame (708). A sliding groove (701) is opened on the upper surface of the storage plate (7). A slider (702) is slidably connected inside the sliding groove (701). A connecting frame (705) is fixedly connected to the bottom of the slider (702). A telescopic rod (703) is connected to the surface of the slider (702). A limit rod (704) is fixedly connected to the top of the outer surface of the telescopic rod (703). A buffer plate (706) is fixedly connected to the bottom of the limit rod (704).

4. The tool cart with a tool missing alarm function according to claim 3, characterized in that: There are two sliders (702), and a sliding rod is fixedly connected to the side of the two sliders (702) that is far apart from each other. The sliding rod passes through the surface of the telescopic rod (703) and is rotatably connected to the telescopic rod (703).

5. The tool cart with a tool missing alarm function according to claim 1, characterized in that: A power supply box (8) is fixedly installed on the bottom of the inner wall of the tool cart (1). The power supply box (8) is electrically connected to the micro hydraulic cylinder (707), the weight sensor (407) and the alarm respectively.

6. The tool cart with a tool missing alarm function according to claim 1, characterized in that: The front of the tool cart (1) is hinged with a door (3). A placement frame (301) is fixedly connected to the inner wall of the door (3). A ventilation hole (302) is opened on the surface of the placement frame (301). A through drainage groove (303) is opened on the lower surface of the placement frame (301). A sloping plate (304) is fixedly connected to the bottom of the inner wall of the door (3). A drainage hole is opened at the bottom of the door (3). A drain pipe (305) communicating with the drainage hole is fixedly connected to the bottom of the door (3).

7. The tool cart with a tool missing alarm function according to claim 1, characterized in that: The tool cart (1) has a back plate (5) fixedly connected to its back side, and a ventilation box (501) fixedly connected to the front side of the back plate (5). A fan (502) is fixedly installed inside the back plate (5), and a filter element one (503) and a filter element two (504) are provided inside the ventilation box (501).

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